Interested in the feasibility of harvesting ambient RF as part of a school project so I used a network analyzer to determine the strongest frequencies on campus and designed an impedance matching circuit paired with a 3-stage Dickson multiplier/rectifier for each frequency. It's divided into several parts. Antenna -> Diplexer (splits frequencies into high/low bands) -> Impedance matching -> Rectifier/Step-up circuits -> Test points. This was made to make it easier to determine how much voltage can truly be harvested prior to adding a DC step-up component or other forms of power management (such as storage caps) via multimeter. In the future, the test points can be connected to capacitors or other forms of power management to try to power low power micro-controllers or sensors or the design can be optimized as well. Although it hasn't been brought to life yet, I did a fair amount of simulations in LTspice and also experimented with tolerance values for components as well as adding parasitic inductance values to simulate real-world loss and the results were still very promising.